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【单选题】
She said her brother ____ in Beijing. He ______ to Japan on business last week.A.
hasn’t, went
B.
wasn’t, went
C.
wasn’t, would go
D.
would be, went
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【单选题】My car broke down last Monday without any previous(), leaving me an hour late to work.
A.
partner
B.
boost
C.
symptom
【单选题】A One evening last July．my old car broke down on a highway． It was an hour before sunset．and I was 25 miles from home． I couldn-t reach anyone to pick me up．so I decided to take a bus． After a while．a...
A.
take hold of and lift．．．
B.
choose．．． carefully
C.
give．．． a ride
D.
hear on learn．．．
【简答题】设总体ξ的概率密度为 其中θ(θ＞-1)是未知参数，ξ 1 ，ξ 2 ，…，ξ n 是来自总体ξ的一个容量为n的简单随机样本，试分别用矩估计法和最大似然估计法求θ的估计量．
【简答题】My car broke down an overheated engine.
【简答题】My car broke down last Monday without any previous ( ), leaving me an hour late to work.
【简答题】阅读理解。 One evening last July, my old car broke down on a highway. It was an hour before sunset, and l was 25 miles from home. I couldn't reach anyone to pick me up, so I decided to take a bus. After ...
【单选题】My car broke down last Monday without any previous_______ , leaving me an hour late to work.
A.
extremely
B.
research
C.
symptom
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